drivers/media/platform/davinci/vpss.c - linux-mtk - Git at Google

 /*
  * Copyright (C) 2009 Texas Instruments.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation; either version 2 of the License, or
  * (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * common vpss system module platform driver for all video drivers.
  */
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/io.h>
 #include <linux/pm_runtime.h>
 #include <linux/err.h>

 #include <media/davinci/vpss.h>

 MODULE_LICENSE("GPL");
 MODULE_DESCRIPTION("VPSS Driver");
 MODULE_AUTHOR("Texas Instruments");

 /* DM644x defines */
 #define DM644X_SBL_PCR_VPSS		(4)

 #define DM355_VPSSBL_INTSEL		0x10
 #define DM355_VPSSBL_EVTSEL		0x14
 /* vpss BL register offsets */
 #define DM355_VPSSBL_CCDCMUX		0x1c
 /* vpss CLK register offsets */
 #define DM355_VPSSCLK_CLKCTRL		0x04
 /* masks and shifts */
 #define VPSS_HSSISEL_SHIFT		4
 /*
  * VDINT0 - vpss_int0, VDINT1 - vpss_int1, H3A - vpss_int4,
  * IPIPE_INT1_SDR - vpss_int5
  */
 #define DM355_VPSSBL_INTSEL_DEFAULT	0xff83ff10
 /* VENCINT - vpss_int8 */
 #define DM355_VPSSBL_EVTSEL_DEFAULT	0x4

 #define DM365_ISP5_PCCR				0x04
 #define DM365_ISP5_PCCR_BL_CLK_ENABLE		BIT(0)
 #define DM365_ISP5_PCCR_ISIF_CLK_ENABLE		BIT(1)
 #define DM365_ISP5_PCCR_H3A_CLK_ENABLE		BIT(2)
 #define DM365_ISP5_PCCR_RSZ_CLK_ENABLE		BIT(3)
 #define DM365_ISP5_PCCR_IPIPE_CLK_ENABLE	BIT(4)
 #define DM365_ISP5_PCCR_IPIPEIF_CLK_ENABLE	BIT(5)
 #define DM365_ISP5_PCCR_RSV			BIT(6)

 #define DM365_ISP5_BCR			0x08
 #define DM365_ISP5_BCR_ISIF_OUT_ENABLE	BIT(1)

 #define DM365_ISP5_INTSEL1		0x10
 #define DM365_ISP5_INTSEL2		0x14
 #define DM365_ISP5_INTSEL3		0x18
 #define DM365_ISP5_CCDCMUX		0x20
 #define DM365_ISP5_PG_FRAME_SIZE	0x28
 #define DM365_VPBE_CLK_CTRL		0x00

 #define VPSS_CLK_CTRL			0x01c40044
 #define VPSS_CLK_CTRL_VENCCLKEN		BIT(3)
 #define VPSS_CLK_CTRL_DACCLKEN		BIT(4)

 /*
  * vpss interrupts. VDINT0 - vpss_int0, VDINT1 - vpss_int1,
  * AF - vpss_int3
  */
 #define DM365_ISP5_INTSEL1_DEFAULT	0x0b1f0100
 /* AEW - vpss_int6, RSZ_INT_DMA - vpss_int5 */
 #define DM365_ISP5_INTSEL2_DEFAULT	0x1f0a0f1f
 /* VENC - vpss_int8 */
 #define DM365_ISP5_INTSEL3_DEFAULT	0x00000015

 /* masks and shifts for DM365*/
 #define DM365_CCDC_PG_VD_POL_SHIFT	0
 #define DM365_CCDC_PG_HD_POL_SHIFT	1

 #define CCD_SRC_SEL_MASK		(BIT_MASK(5) | BIT_MASK(4))
 #define CCD_SRC_SEL_SHIFT		4

 /* Different SoC platforms supported by this driver */
 enum vpss_platform_type {
 	DM644X,
 	DM355,
 	DM365,
 };

 /*
  * vpss operations. Depends on platform. Not all functions are available
  * on all platforms. The api, first check if a function is available before
  * invoking it. In the probe, the function ptrs are initialized based on
  * vpss name. vpss name can be "dm355_vpss", "dm644x_vpss" etc.
  */
 struct vpss_hw_ops {
 	/* enable clock */
 	int (*enable_clock)(enum vpss_clock_sel clock_sel, int en);
 	/* select input to ccdc */
 	void (*select_ccdc_source)(enum vpss_ccdc_source_sel src_sel);
 	/* clear wbl overflow bit */
 	int (*clear_wbl_overflow)(enum vpss_wbl_sel wbl_sel);
 	/* set sync polarity */
 	void (*set_sync_pol)(struct vpss_sync_pol);
 	/* set the PG_FRAME_SIZE register*/
 	void (*set_pg_frame_size)(struct vpss_pg_frame_size);
 	/* check and clear interrupt if occurred */
 	int (*dma_complete_interrupt)(void);
 };

 /* vpss configuration */
 struct vpss_oper_config {
 	__iomem void *vpss_regs_base0;
 	__iomem void *vpss_regs_base1;
 	__iomem void *vpss_regs_base2;
 	enum vpss_platform_type platform;
 	spinlock_t vpss_lock;
 	struct vpss_hw_ops hw_ops;
 };

 static struct vpss_oper_config oper_cfg;

 /* register access routines */
 static inline u32 bl_regr(u32 offset)
 {
 	return __raw_readl(oper_cfg.vpss_regs_base0 + offset);
 }

 static inline void bl_regw(u32 val, u32 offset)
 {
 	__raw_writel(val, oper_cfg.vpss_regs_base0 + offset);
 }

 static inline u32 vpss_regr(u32 offset)
 {
 	return __raw_readl(oper_cfg.vpss_regs_base1 + offset);
 }

 static inline void vpss_regw(u32 val, u32 offset)
 {
 	__raw_writel(val, oper_cfg.vpss_regs_base1 + offset);
 }

 /* For DM365 only */
 static inline u32 isp5_read(u32 offset)
 {
 	return __raw_readl(oper_cfg.vpss_regs_base0 + offset);
 }

 /* For DM365 only */
 static inline void isp5_write(u32 val, u32 offset)
 {
 	__raw_writel(val, oper_cfg.vpss_regs_base0 + offset);
 }

 static void dm365_select_ccdc_source(enum vpss_ccdc_source_sel src_sel)
 {
 	u32 temp = isp5_read(DM365_ISP5_CCDCMUX) & ~CCD_SRC_SEL_MASK;

 	/* if we are using pattern generator, enable it */
 	if (src_sel == VPSS_PGLPBK || src_sel == VPSS_CCDCPG)
 		temp |= 0x08;

 	temp |= (src_sel << CCD_SRC_SEL_SHIFT);
 	isp5_write(temp, DM365_ISP5_CCDCMUX);
 }

 static void dm355_select_ccdc_source(enum vpss_ccdc_source_sel src_sel)
 {
 	bl_regw(src_sel << VPSS_HSSISEL_SHIFT, DM355_VPSSBL_CCDCMUX);
 }

 int vpss_dma_complete_interrupt(void)
 {
 	if (!oper_cfg.hw_ops.dma_complete_interrupt)
 		return 2;
 	return oper_cfg.hw_ops.dma_complete_interrupt();
 }
 EXPORT_SYMBOL(vpss_dma_complete_interrupt);

 int vpss_select_ccdc_source(enum vpss_ccdc_source_sel src_sel)
 {
 	if (!oper_cfg.hw_ops.select_ccdc_source)
 		return -EINVAL;

 	oper_cfg.hw_ops.select_ccdc_source(src_sel);
 	return 0;
 }
 EXPORT_SYMBOL(vpss_select_ccdc_source);

 static int dm644x_clear_wbl_overflow(enum vpss_wbl_sel wbl_sel)
 {
 	u32 mask = 1, val;

 	if (wbl_sel < VPSS_PCR_AEW_WBL_0 ||
 	    wbl_sel > VPSS_PCR_CCDC_WBL_O)
 		return -EINVAL;

 	/* writing a 0 clear the overflow */
 	mask = ~(mask << wbl_sel);
 	val = bl_regr(DM644X_SBL_PCR_VPSS) & mask;
 	bl_regw(val, DM644X_SBL_PCR_VPSS);
 	return 0;
 }

 void vpss_set_sync_pol(struct vpss_sync_pol sync)
 {
 	if (!oper_cfg.hw_ops.set_sync_pol)
 		return;

 	oper_cfg.hw_ops.set_sync_pol(sync);
 }
 EXPORT_SYMBOL(vpss_set_sync_pol);

 int vpss_clear_wbl_overflow(enum vpss_wbl_sel wbl_sel)
 {
 	if (!oper_cfg.hw_ops.clear_wbl_overflow)
 		return -EINVAL;

 	return oper_cfg.hw_ops.clear_wbl_overflow(wbl_sel);
 }
 EXPORT_SYMBOL(vpss_clear_wbl_overflow);

 /*
  *  dm355_enable_clock - Enable VPSS Clock
  *  @clock_sel: Clock to be enabled/disabled
  *  @en: enable/disable flag
  *
  *  This is called to enable or disable a vpss clock
  */
 static int dm355_enable_clock(enum vpss_clock_sel clock_sel, int en)
 {
 	unsigned long flags;
 	u32 utemp, mask = 0x1, shift = 0;

 	switch (clock_sel) {
 	case VPSS_VPBE_CLOCK:
 		/* nothing since lsb */
 		break;
 	case VPSS_VENC_CLOCK_SEL:
 		shift = 2;
 		break;
 	case VPSS_CFALD_CLOCK:
 		shift = 3;
 		break;
 	case VPSS_H3A_CLOCK:
 		shift = 4;
 		break;
 	case VPSS_IPIPE_CLOCK:
 		shift = 5;
 		break;
 	case VPSS_CCDC_CLOCK:
 		shift = 6;
 		break;
 	default:
 		printk(KERN_ERR "dm355_enable_clock: Invalid selector: %d\n",
 		       clock_sel);
 		return -EINVAL;
 	}

 	spin_lock_irqsave(&oper_cfg.vpss_lock, flags);
 	utemp = vpss_regr(DM355_VPSSCLK_CLKCTRL);
 	if (!en)
 		utemp &= ~(mask << shift);
 	else
 		utemp |= (mask << shift);

 	vpss_regw(utemp, DM355_VPSSCLK_CLKCTRL);
 	spin_unlock_irqrestore(&oper_cfg.vpss_lock, flags);
 	return 0;
 }

 static int dm365_enable_clock(enum vpss_clock_sel clock_sel, int en)
 {
 	unsigned long flags;
 	u32 utemp, mask = 0x1, shift = 0, offset = DM365_ISP5_PCCR;
 	u32 (*read)(u32 offset) = isp5_read;
 	void(*write)(u32 val, u32 offset) = isp5_write;

 	switch (clock_sel) {
 	case VPSS_BL_CLOCK:
 		break;
 	case VPSS_CCDC_CLOCK:
 		shift = 1;
 		break;
 	case VPSS_H3A_CLOCK:
 		shift = 2;
 		break;
 	case VPSS_RSZ_CLOCK:
 		shift = 3;
 		break;
 	case VPSS_IPIPE_CLOCK:
 		shift = 4;
 		break;
 	case VPSS_IPIPEIF_CLOCK:
 		shift = 5;
 		break;
 	case VPSS_PCLK_INTERNAL:
 		shift = 6;
 		break;
 	case VPSS_PSYNC_CLOCK_SEL:
 		shift = 7;
 		break;
 	case VPSS_VPBE_CLOCK:
 		read = vpss_regr;
 		write = vpss_regw;
 		offset = DM365_VPBE_CLK_CTRL;
 		break;
 	case VPSS_VENC_CLOCK_SEL:
 		shift = 2;
 		read = vpss_regr;
 		write = vpss_regw;
 		offset = DM365_VPBE_CLK_CTRL;
 		break;
 	case VPSS_LDC_CLOCK:
 		shift = 3;
 		read = vpss_regr;
 		write = vpss_regw;
 		offset = DM365_VPBE_CLK_CTRL;
 		break;
 	case VPSS_FDIF_CLOCK:
 		shift = 4;
 		read = vpss_regr;
 		write = vpss_regw;
 		offset = DM365_VPBE_CLK_CTRL;
 		break;
 	case VPSS_OSD_CLOCK_SEL:
 		shift = 6;
 		read = vpss_regr;
 		write = vpss_regw;
 		offset = DM365_VPBE_CLK_CTRL;
 		break;
 	case VPSS_LDC_CLOCK_SEL:
 		shift = 7;
 		read = vpss_regr;
 		write = vpss_regw;
 		offset = DM365_VPBE_CLK_CTRL;
 		break;
 	default:
 		printk(KERN_ERR "dm365_enable_clock: Invalid selector: %d\n",
 		       clock_sel);
 		return -1;
 	}

 	spin_lock_irqsave(&oper_cfg.vpss_lock, flags);
 	utemp = read(offset);
 	if (!en) {
 		mask = ~mask;
 		utemp &= (mask << shift);
 	} else
 		utemp |= (mask << shift);

 	write(utemp, offset);
 	spin_unlock_irqrestore(&oper_cfg.vpss_lock, flags);

 	return 0;
 }

 int vpss_enable_clock(enum vpss_clock_sel clock_sel, int en)
 {
 	if (!oper_cfg.hw_ops.enable_clock)
 		return -EINVAL;

 	return oper_cfg.hw_ops.enable_clock(clock_sel, en);
 }
 EXPORT_SYMBOL(vpss_enable_clock);

 void dm365_vpss_set_sync_pol(struct vpss_sync_pol sync)
 {
 	int val = 0;
 	val = isp5_read(DM365_ISP5_CCDCMUX);

 	val |= (sync.ccdpg_hdpol << DM365_CCDC_PG_HD_POL_SHIFT);
 	val |= (sync.ccdpg_vdpol << DM365_CCDC_PG_VD_POL_SHIFT);

 	isp5_write(val, DM365_ISP5_CCDCMUX);
 }
 EXPORT_SYMBOL(dm365_vpss_set_sync_pol);

 void vpss_set_pg_frame_size(struct vpss_pg_frame_size frame_size)
 {
 	if (!oper_cfg.hw_ops.set_pg_frame_size)
 		return;

 	oper_cfg.hw_ops.set_pg_frame_size(frame_size);
 }
 EXPORT_SYMBOL(vpss_set_pg_frame_size);

 void dm365_vpss_set_pg_frame_size(struct vpss_pg_frame_size frame_size)
 {
 	int current_reg = ((frame_size.hlpfr >> 1) - 1) << 16;

 	current_reg |= (frame_size.pplen - 1);
 	isp5_write(current_reg, DM365_ISP5_PG_FRAME_SIZE);
 }
 EXPORT_SYMBOL(dm365_vpss_set_pg_frame_size);

 static int vpss_probe(struct platform_device *pdev)
 {
 	struct resource *res;
 	char *platform_name;

 	if (!pdev->dev.platform_data) {
 		dev_err(&pdev->dev, "no platform data\n");
 		return -ENOENT;
 	}

 	platform_name = pdev->dev.platform_data;
 	if (!strcmp(platform_name, "dm355_vpss"))
 		oper_cfg.platform = DM355;
 	else if (!strcmp(platform_name, "dm365_vpss"))
 		oper_cfg.platform = DM365;
 	else if (!strcmp(platform_name, "dm644x_vpss"))
 		oper_cfg.platform = DM644X;
 	else {
 		dev_err(&pdev->dev, "vpss driver not supported on this platform\n");
 		return -ENODEV;
 	}

 	dev_info(&pdev->dev, "%s vpss probed\n", platform_name);
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);

 	oper_cfg.vpss_regs_base0 = devm_ioremap_resource(&pdev->dev, res);
 	if (IS_ERR(oper_cfg.vpss_regs_base0))
 		return PTR_ERR(oper_cfg.vpss_regs_base0);

 	if (oper_cfg.platform == DM355 || oper_cfg.platform == DM365) {
 		res = platform_get_resource(pdev, IORESOURCE_MEM, 1);

 		oper_cfg.vpss_regs_base1 = devm_ioremap_resource(&pdev->dev,
 								 res);
 		if (IS_ERR(oper_cfg.vpss_regs_base1))
 			return PTR_ERR(oper_cfg.vpss_regs_base1);
 	}

 	if (oper_cfg.platform == DM355) {
 		oper_cfg.hw_ops.enable_clock = dm355_enable_clock;
 		oper_cfg.hw_ops.select_ccdc_source = dm355_select_ccdc_source;
 		/* Setup vpss interrupts */
 		bl_regw(DM355_VPSSBL_INTSEL_DEFAULT, DM355_VPSSBL_INTSEL);
 		bl_regw(DM355_VPSSBL_EVTSEL_DEFAULT, DM355_VPSSBL_EVTSEL);
 	} else if (oper_cfg.platform == DM365) {
 		oper_cfg.hw_ops.enable_clock = dm365_enable_clock;
 		oper_cfg.hw_ops.select_ccdc_source = dm365_select_ccdc_source;
 		/* Setup vpss interrupts */
 		isp5_write((isp5_read(DM365_ISP5_PCCR) |
 				      DM365_ISP5_PCCR_BL_CLK_ENABLE |
 				      DM365_ISP5_PCCR_ISIF_CLK_ENABLE |
 				      DM365_ISP5_PCCR_H3A_CLK_ENABLE |
 				      DM365_ISP5_PCCR_RSZ_CLK_ENABLE |
 				      DM365_ISP5_PCCR_IPIPE_CLK_ENABLE |
 				      DM365_ISP5_PCCR_IPIPEIF_CLK_ENABLE |
 				      DM365_ISP5_PCCR_RSV), DM365_ISP5_PCCR);
 		isp5_write((isp5_read(DM365_ISP5_BCR) |
 			    DM365_ISP5_BCR_ISIF_OUT_ENABLE), DM365_ISP5_BCR);
 		isp5_write(DM365_ISP5_INTSEL1_DEFAULT, DM365_ISP5_INTSEL1);
 		isp5_write(DM365_ISP5_INTSEL2_DEFAULT, DM365_ISP5_INTSEL2);
 		isp5_write(DM365_ISP5_INTSEL3_DEFAULT, DM365_ISP5_INTSEL3);
 	} else
 		oper_cfg.hw_ops.clear_wbl_overflow = dm644x_clear_wbl_overflow;

 	pm_runtime_enable(&pdev->dev);

 	pm_runtime_get(&pdev->dev);

 	spin_lock_init(&oper_cfg.vpss_lock);
 	dev_info(&pdev->dev, "%s vpss probe success\n", platform_name);

 	return 0;
 }

 static int vpss_remove(struct platform_device *pdev)
 {
 	pm_runtime_disable(&pdev->dev);
 	return 0;
 }

 static int vpss_suspend(struct device *dev)
 {
 	pm_runtime_put(dev);
 	return 0;
 }

 static int vpss_resume(struct device *dev)
 {
 	pm_runtime_get(dev);
 	return 0;
 }

 static const struct dev_pm_ops vpss_pm_ops = {
 	.suspend = vpss_suspend,
 	.resume = vpss_resume,
 };

 static struct platform_driver vpss_driver = {
 	.driver = {
 		.name	= "vpss",
 		.pm = &vpss_pm_ops,
 	},
 	.remove = vpss_remove,
 	.probe = vpss_probe,
 };

 static void vpss_exit(void)
 {
 	iounmap(oper_cfg.vpss_regs_base2);
 	release_mem_region(VPSS_CLK_CTRL, 4);
 	platform_driver_unregister(&vpss_driver);
 }

 static int __init vpss_init(void)
 {
 	if (!request_mem_region(VPSS_CLK_CTRL, 4, "vpss_clock_control"))
 		return -EBUSY;

 	oper_cfg.vpss_regs_base2 = ioremap(VPSS_CLK_CTRL, 4);
 	if (unlikely(!oper_cfg.vpss_regs_base2)) {
 		release_mem_region(VPSS_CLK_CTRL, 4);
 		return -ENOMEM;
 	}

 	writel(VPSS_CLK_CTRL_VENCCLKEN |
 		     VPSS_CLK_CTRL_DACCLKEN, oper_cfg.vpss_regs_base2);

 	return platform_driver_register(&vpss_driver);
 }
 subsys_initcall(vpss_init);
 module_exit(vpss_exit);
	/*
	* Copyright (C) 2009 Texas Instruments.
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License as published by
	* the Free Software Foundation; either version 2 of the License, or
	* (at your option) any later version.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	* common vpss system module platform driver for all video drivers.
	*/
	#include <linux/module.h>
	#include <linux/platform_device.h>
	#include <linux/io.h>
	#include <linux/pm_runtime.h>
	#include <linux/err.h>

	#include <media/davinci/vpss.h>

	MODULE_LICENSE("GPL");
	MODULE_DESCRIPTION("VPSS Driver");
	MODULE_AUTHOR("Texas Instruments");

	/* DM644x defines */
	#define DM644X_SBL_PCR_VPSS (4)

	#define DM355_VPSSBL_INTSEL 0x10
	#define DM355_VPSSBL_EVTSEL 0x14
	/* vpss BL register offsets */
	#define DM355_VPSSBL_CCDCMUX 0x1c
	/* vpss CLK register offsets */
	#define DM355_VPSSCLK_CLKCTRL 0x04
	/* masks and shifts */
	#define VPSS_HSSISEL_SHIFT 4
	/*
	* VDINT0 - vpss_int0, VDINT1 - vpss_int1, H3A - vpss_int4,
	* IPIPE_INT1_SDR - vpss_int5
	*/
	#define DM355_VPSSBL_INTSEL_DEFAULT 0xff83ff10
	/* VENCINT - vpss_int8 */
	#define DM355_VPSSBL_EVTSEL_DEFAULT 0x4

	#define DM365_ISP5_PCCR 0x04
	#define DM365_ISP5_PCCR_BL_CLK_ENABLE BIT(0)
	#define DM365_ISP5_PCCR_ISIF_CLK_ENABLE BIT(1)
	#define DM365_ISP5_PCCR_H3A_CLK_ENABLE BIT(2)
	#define DM365_ISP5_PCCR_RSZ_CLK_ENABLE BIT(3)
	#define DM365_ISP5_PCCR_IPIPE_CLK_ENABLE BIT(4)
	#define DM365_ISP5_PCCR_IPIPEIF_CLK_ENABLE BIT(5)
	#define DM365_ISP5_PCCR_RSV BIT(6)

	#define DM365_ISP5_BCR 0x08
	#define DM365_ISP5_BCR_ISIF_OUT_ENABLE BIT(1)

	#define DM365_ISP5_INTSEL1 0x10
	#define DM365_ISP5_INTSEL2 0x14
	#define DM365_ISP5_INTSEL3 0x18
	#define DM365_ISP5_CCDCMUX 0x20
	#define DM365_ISP5_PG_FRAME_SIZE 0x28
	#define DM365_VPBE_CLK_CTRL 0x00

	#define VPSS_CLK_CTRL 0x01c40044
	#define VPSS_CLK_CTRL_VENCCLKEN BIT(3)
	#define VPSS_CLK_CTRL_DACCLKEN BIT(4)

	/*
	* vpss interrupts. VDINT0 - vpss_int0, VDINT1 - vpss_int1,
	* AF - vpss_int3
	*/
	#define DM365_ISP5_INTSEL1_DEFAULT 0x0b1f0100
	/* AEW - vpss_int6, RSZ_INT_DMA - vpss_int5 */
	#define DM365_ISP5_INTSEL2_DEFAULT 0x1f0a0f1f
	/* VENC - vpss_int8 */
	#define DM365_ISP5_INTSEL3_DEFAULT 0x00000015

	/* masks and shifts for DM365*/
	#define DM365_CCDC_PG_VD_POL_SHIFT 0
	#define DM365_CCDC_PG_HD_POL_SHIFT 1

	#define CCD_SRC_SEL_MASK (BIT_MASK(5) \| BIT_MASK(4))
	#define CCD_SRC_SEL_SHIFT 4

	/* Different SoC platforms supported by this driver */
	enum vpss_platform_type {
	DM644X,
	DM355,
	DM365,
	};

	/*
	* vpss operations. Depends on platform. Not all functions are available
	* on all platforms. The api, first check if a function is available before
	* invoking it. In the probe, the function ptrs are initialized based on
	* vpss name. vpss name can be "dm355_vpss", "dm644x_vpss" etc.
	*/
	struct vpss_hw_ops {
	/* enable clock */
	int (*enable_clock)(enum vpss_clock_sel clock_sel, int en);
	/* select input to ccdc */
	void (*select_ccdc_source)(enum vpss_ccdc_source_sel src_sel);
	/* clear wbl overflow bit */
	int (*clear_wbl_overflow)(enum vpss_wbl_sel wbl_sel);
	/* set sync polarity */
	void (*set_sync_pol)(struct vpss_sync_pol);
	/* set the PG_FRAME_SIZE register*/
	void (*set_pg_frame_size)(struct vpss_pg_frame_size);
	/* check and clear interrupt if occurred */
	int (*dma_complete_interrupt)(void);
	};

	/* vpss configuration */
	struct vpss_oper_config {
	__iomem void *vpss_regs_base0;
	__iomem void *vpss_regs_base1;
	__iomem void *vpss_regs_base2;
	enum vpss_platform_type platform;
	spinlock_t vpss_lock;
	struct vpss_hw_ops hw_ops;
	};

	static struct vpss_oper_config oper_cfg;

	/* register access routines */
	static inline u32 bl_regr(u32 offset)
	{
	return __raw_readl(oper_cfg.vpss_regs_base0 + offset);
	}

	static inline void bl_regw(u32 val, u32 offset)
	{
	__raw_writel(val, oper_cfg.vpss_regs_base0 + offset);
	}

	static inline u32 vpss_regr(u32 offset)
	{
	return __raw_readl(oper_cfg.vpss_regs_base1 + offset);
	}

	static inline void vpss_regw(u32 val, u32 offset)
	{
	__raw_writel(val, oper_cfg.vpss_regs_base1 + offset);
	}

	/* For DM365 only */
	static inline u32 isp5_read(u32 offset)
	{
	return __raw_readl(oper_cfg.vpss_regs_base0 + offset);
	}

	/* For DM365 only */
	static inline void isp5_write(u32 val, u32 offset)
	{
	__raw_writel(val, oper_cfg.vpss_regs_base0 + offset);
	}

	static void dm365_select_ccdc_source(enum vpss_ccdc_source_sel src_sel)
	{
	u32 temp = isp5_read(DM365_ISP5_CCDCMUX) & ~CCD_SRC_SEL_MASK;

	/* if we are using pattern generator, enable it */
	if (src_sel == VPSS_PGLPBK \|\| src_sel == VPSS_CCDCPG)
	temp \|= 0x08;

	temp \|= (src_sel << CCD_SRC_SEL_SHIFT);
	isp5_write(temp, DM365_ISP5_CCDCMUX);
	}

	static void dm355_select_ccdc_source(enum vpss_ccdc_source_sel src_sel)
	{
	bl_regw(src_sel << VPSS_HSSISEL_SHIFT, DM355_VPSSBL_CCDCMUX);
	}

	int vpss_dma_complete_interrupt(void)
	{
	if (!oper_cfg.hw_ops.dma_complete_interrupt)
	return 2;
	return oper_cfg.hw_ops.dma_complete_interrupt();
	}
	EXPORT_SYMBOL(vpss_dma_complete_interrupt);

	int vpss_select_ccdc_source(enum vpss_ccdc_source_sel src_sel)
	{
	if (!oper_cfg.hw_ops.select_ccdc_source)
	return -EINVAL;

	oper_cfg.hw_ops.select_ccdc_source(src_sel);
	return 0;
	}
	EXPORT_SYMBOL(vpss_select_ccdc_source);

	static int dm644x_clear_wbl_overflow(enum vpss_wbl_sel wbl_sel)
	{
	u32 mask = 1, val;

	if (wbl_sel < VPSS_PCR_AEW_WBL_0 \|\|
	wbl_sel > VPSS_PCR_CCDC_WBL_O)
	return -EINVAL;

	/* writing a 0 clear the overflow */
	mask = ~(mask << wbl_sel);
	val = bl_regr(DM644X_SBL_PCR_VPSS) & mask;
	bl_regw(val, DM644X_SBL_PCR_VPSS);
	return 0;
	}

	void vpss_set_sync_pol(struct vpss_sync_pol sync)
	{
	if (!oper_cfg.hw_ops.set_sync_pol)
	return;

	oper_cfg.hw_ops.set_sync_pol(sync);
	}
	EXPORT_SYMBOL(vpss_set_sync_pol);

	int vpss_clear_wbl_overflow(enum vpss_wbl_sel wbl_sel)
	{
	if (!oper_cfg.hw_ops.clear_wbl_overflow)
	return -EINVAL;

	return oper_cfg.hw_ops.clear_wbl_overflow(wbl_sel);
	}
	EXPORT_SYMBOL(vpss_clear_wbl_overflow);

	/*
	* dm355_enable_clock - Enable VPSS Clock
	* @clock_sel: Clock to be enabled/disabled
	* @en: enable/disable flag
	*
	* This is called to enable or disable a vpss clock
	*/
	static int dm355_enable_clock(enum vpss_clock_sel clock_sel, int en)
	{
	unsigned long flags;
	u32 utemp, mask = 0x1, shift = 0;

	switch (clock_sel) {
	case VPSS_VPBE_CLOCK:
	/* nothing since lsb */
	break;
	case VPSS_VENC_CLOCK_SEL:
	shift = 2;
	break;
	case VPSS_CFALD_CLOCK:
	shift = 3;
	break;
	case VPSS_H3A_CLOCK:
	shift = 4;
	break;
	case VPSS_IPIPE_CLOCK:
	shift = 5;
	break;
	case VPSS_CCDC_CLOCK:
	shift = 6;
	break;
	default:
	printk(KERN_ERR "dm355_enable_clock: Invalid selector: %d\n",
	clock_sel);
	return -EINVAL;
	}

	spin_lock_irqsave(&oper_cfg.vpss_lock, flags);
	utemp = vpss_regr(DM355_VPSSCLK_CLKCTRL);
	if (!en)
	utemp &= ~(mask << shift);
	else
	utemp \|= (mask << shift);

	vpss_regw(utemp, DM355_VPSSCLK_CLKCTRL);
	spin_unlock_irqrestore(&oper_cfg.vpss_lock, flags);
	return 0;
	}

	static int dm365_enable_clock(enum vpss_clock_sel clock_sel, int en)
	{
	unsigned long flags;
	u32 utemp, mask = 0x1, shift = 0, offset = DM365_ISP5_PCCR;
	u32 (*read)(u32 offset) = isp5_read;
	void(*write)(u32 val, u32 offset) = isp5_write;

	switch (clock_sel) {
	case VPSS_BL_CLOCK:
	break;
	case VPSS_CCDC_CLOCK:
	shift = 1;
	break;
	case VPSS_H3A_CLOCK:
	shift = 2;
	break;
	case VPSS_RSZ_CLOCK:
	shift = 3;
	break;
	case VPSS_IPIPE_CLOCK:
	shift = 4;
	break;
	case VPSS_IPIPEIF_CLOCK:
	shift = 5;
	break;
	case VPSS_PCLK_INTERNAL:
	shift = 6;
	break;
	case VPSS_PSYNC_CLOCK_SEL:
	shift = 7;
	break;
	case VPSS_VPBE_CLOCK:
	read = vpss_regr;
	write = vpss_regw;
	offset = DM365_VPBE_CLK_CTRL;
	break;
	case VPSS_VENC_CLOCK_SEL:
	shift = 2;
	read = vpss_regr;
	write = vpss_regw;
	offset = DM365_VPBE_CLK_CTRL;
	break;
	case VPSS_LDC_CLOCK:
	shift = 3;
	read = vpss_regr;
	write = vpss_regw;
	offset = DM365_VPBE_CLK_CTRL;
	break;
	case VPSS_FDIF_CLOCK:
	shift = 4;
	read = vpss_regr;
	write = vpss_regw;
	offset = DM365_VPBE_CLK_CTRL;
	break;
	case VPSS_OSD_CLOCK_SEL:
	shift = 6;
	read = vpss_regr;
	write = vpss_regw;
	offset = DM365_VPBE_CLK_CTRL;
	break;
	case VPSS_LDC_CLOCK_SEL:
	shift = 7;
	read = vpss_regr;
	write = vpss_regw;
	offset = DM365_VPBE_CLK_CTRL;
	break;
	default:
	printk(KERN_ERR "dm365_enable_clock: Invalid selector: %d\n",
	clock_sel);
	return -1;
	}

	spin_lock_irqsave(&oper_cfg.vpss_lock, flags);
	utemp = read(offset);
	if (!en) {
	mask = ~mask;
	utemp &= (mask << shift);
	} else
	utemp \|= (mask << shift);

	write(utemp, offset);
	spin_unlock_irqrestore(&oper_cfg.vpss_lock, flags);

	return 0;
	}

	int vpss_enable_clock(enum vpss_clock_sel clock_sel, int en)
	{
	if (!oper_cfg.hw_ops.enable_clock)
	return -EINVAL;

	return oper_cfg.hw_ops.enable_clock(clock_sel, en);
	}
	EXPORT_SYMBOL(vpss_enable_clock);

	void dm365_vpss_set_sync_pol(struct vpss_sync_pol sync)
	{
	int val = 0;
	val = isp5_read(DM365_ISP5_CCDCMUX);

	val \|= (sync.ccdpg_hdpol << DM365_CCDC_PG_HD_POL_SHIFT);
	val \|= (sync.ccdpg_vdpol << DM365_CCDC_PG_VD_POL_SHIFT);

	isp5_write(val, DM365_ISP5_CCDCMUX);
	}
	EXPORT_SYMBOL(dm365_vpss_set_sync_pol);

	void vpss_set_pg_frame_size(struct vpss_pg_frame_size frame_size)
	{
	if (!oper_cfg.hw_ops.set_pg_frame_size)
	return;

	oper_cfg.hw_ops.set_pg_frame_size(frame_size);
	}
	EXPORT_SYMBOL(vpss_set_pg_frame_size);

	void dm365_vpss_set_pg_frame_size(struct vpss_pg_frame_size frame_size)
	{
	int current_reg = ((frame_size.hlpfr >> 1) - 1) << 16;

	current_reg \|= (frame_size.pplen - 1);
	isp5_write(current_reg, DM365_ISP5_PG_FRAME_SIZE);
	}
	EXPORT_SYMBOL(dm365_vpss_set_pg_frame_size);

	static int vpss_probe(struct platform_device *pdev)
	{
	struct resource *res;
	char *platform_name;

	if (!pdev->dev.platform_data) {
	dev_err(&pdev->dev, "no platform data\n");
	return -ENOENT;
	}

	platform_name = pdev->dev.platform_data;
	if (!strcmp(platform_name, "dm355_vpss"))
	oper_cfg.platform = DM355;
	else if (!strcmp(platform_name, "dm365_vpss"))
	oper_cfg.platform = DM365;
	else if (!strcmp(platform_name, "dm644x_vpss"))
	oper_cfg.platform = DM644X;
	else {
	dev_err(&pdev->dev, "vpss driver not supported on this platform\n");
	return -ENODEV;
	}

	dev_info(&pdev->dev, "%s vpss probed\n", platform_name);
	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);

	oper_cfg.vpss_regs_base0 = devm_ioremap_resource(&pdev->dev, res);
	if (IS_ERR(oper_cfg.vpss_regs_base0))
	return PTR_ERR(oper_cfg.vpss_regs_base0);

	if (oper_cfg.platform == DM355 \|\| oper_cfg.platform == DM365) {
	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);

	oper_cfg.vpss_regs_base1 = devm_ioremap_resource(&pdev->dev,
	res);
	if (IS_ERR(oper_cfg.vpss_regs_base1))
	return PTR_ERR(oper_cfg.vpss_regs_base1);
	}

	if (oper_cfg.platform == DM355) {
	oper_cfg.hw_ops.enable_clock = dm355_enable_clock;
	oper_cfg.hw_ops.select_ccdc_source = dm355_select_ccdc_source;
	/* Setup vpss interrupts */
	bl_regw(DM355_VPSSBL_INTSEL_DEFAULT, DM355_VPSSBL_INTSEL);
	bl_regw(DM355_VPSSBL_EVTSEL_DEFAULT, DM355_VPSSBL_EVTSEL);
	} else if (oper_cfg.platform == DM365) {
	oper_cfg.hw_ops.enable_clock = dm365_enable_clock;
	oper_cfg.hw_ops.select_ccdc_source = dm365_select_ccdc_source;
	/* Setup vpss interrupts */
	isp5_write((isp5_read(DM365_ISP5_PCCR) \|
	DM365_ISP5_PCCR_BL_CLK_ENABLE \|
	DM365_ISP5_PCCR_ISIF_CLK_ENABLE \|
	DM365_ISP5_PCCR_H3A_CLK_ENABLE \|
	DM365_ISP5_PCCR_RSZ_CLK_ENABLE \|
	DM365_ISP5_PCCR_IPIPE_CLK_ENABLE \|
	DM365_ISP5_PCCR_IPIPEIF_CLK_ENABLE \|
	DM365_ISP5_PCCR_RSV), DM365_ISP5_PCCR);
	isp5_write((isp5_read(DM365_ISP5_BCR) \|
	DM365_ISP5_BCR_ISIF_OUT_ENABLE), DM365_ISP5_BCR);
	isp5_write(DM365_ISP5_INTSEL1_DEFAULT, DM365_ISP5_INTSEL1);
	isp5_write(DM365_ISP5_INTSEL2_DEFAULT, DM365_ISP5_INTSEL2);
	isp5_write(DM365_ISP5_INTSEL3_DEFAULT, DM365_ISP5_INTSEL3);
	} else
	oper_cfg.hw_ops.clear_wbl_overflow = dm644x_clear_wbl_overflow;

	pm_runtime_enable(&pdev->dev);

	pm_runtime_get(&pdev->dev);

	spin_lock_init(&oper_cfg.vpss_lock);
	dev_info(&pdev->dev, "%s vpss probe success\n", platform_name);

	return 0;
	}

	static int vpss_remove(struct platform_device *pdev)
	{
	pm_runtime_disable(&pdev->dev);
	return 0;
	}

	static int vpss_suspend(struct device *dev)
	{
	pm_runtime_put(dev);
	return 0;
	}

	static int vpss_resume(struct device *dev)
	{
	pm_runtime_get(dev);
	return 0;
	}

	static const struct dev_pm_ops vpss_pm_ops = {
	.suspend = vpss_suspend,
	.resume = vpss_resume,
	};

	static struct platform_driver vpss_driver = {
	.driver = {
	.name = "vpss",
	.pm = &vpss_pm_ops,
	},
	.remove = vpss_remove,
	.probe = vpss_probe,
	};

	static void vpss_exit(void)
	{
	iounmap(oper_cfg.vpss_regs_base2);
	release_mem_region(VPSS_CLK_CTRL, 4);
	platform_driver_unregister(&vpss_driver);
	}

	static int __init vpss_init(void)
	{
	if (!request_mem_region(VPSS_CLK_CTRL, 4, "vpss_clock_control"))
	return -EBUSY;

	oper_cfg.vpss_regs_base2 = ioremap(VPSS_CLK_CTRL, 4);
	if (unlikely(!oper_cfg.vpss_regs_base2)) {
	release_mem_region(VPSS_CLK_CTRL, 4);
	return -ENOMEM;
	}

	writel(VPSS_CLK_CTRL_VENCCLKEN \|
	VPSS_CLK_CTRL_DACCLKEN, oper_cfg.vpss_regs_base2);

	return platform_driver_register(&vpss_driver);
	}
	subsys_initcall(vpss_init);
	module_exit(vpss_exit);